Chemistry

Problem

For a hydrogen-like ion of atomic number

Z

, which expression gives the radius

r_{n}

of the nth orbit? a)

r_{n}=\dfrac{4\pi\varepsilon_{0}\hbar^{2}}{me^{2}}\,n^{2}

r_{n}=\dfrac{4\pi\varepsilon_{0}\hbar^{2}}{me^{2}}\,\dfrac{n}{Z}

r_{n}=\dfrac{4\pi\varepsilon_{0}\hbar^{2}}{me^{2}}\,\dfrac{n^{2}}{Z}

r_{n}=\dfrac{4\pi\varepsilon_{0}\hbar^{2}}{me^{2}}\,\dfrac{n^{2}}{Z^{2}}